Multi-Gas monitor with pump configured with 4 gas sensors: LEL/O2/H2S/CO. Monitors arrive with ready to use with sensors, stainless-steel alligator clip, USB/AC adapter with cable, rechargeable lithium polymer battery, calibration connector, and Quick Start Guide. Contact mPower for 30+ other interchangeable sensor options, e.g. electrochemical (EC), pellistor, non-dispersive infrared (NDIR) and photo-ionization detector (PID).